To investigate the importance of individual topics in outpatient care services and the preferences for their design from the perspective of young adults with cancer (AYA="adolescents and young adults") in Germany. A total of 514 AYAs aged 18-39 years were surveyed twice over a 12-month period (t1=immediately after acute treatment, t2=12 months post-treatment) regarding the importance and satisfaction with topics such as anxiety, the impact of the illness on partnerships/family and social environment, future perspectives, personal coping strategies, sexuality, and desire for children/fertility, as well as the types of care services. The subjective importance and satisfaction with the care topics and services were analyzed using variance and moderator analyses. The most important topics for care services were future career prospects (M=3.22, SD=1.56), social impact (M=3.19, SD=1.54), and personal coping strategies (M=3.52, SD=1.46). The greatest dissatisfaction was noted in the areas of sexuality (M=2.01, SD=1.59) and desire for children/fertility (M=2.08, SD=1.72). At time t2, relaxation techniques (M=3.46, SD=1.36) and psychological counseling (M=3.43, SD=1.46) were the most desired care services. Female AYAs rated psychological counseling (F[1.199)=9.21, p=0.003), social counseling (F[1.221]=6.60, p=0.011), creative therapy options (F[1.219]=21.74, p<0.001), support groups (F[1.215]=4.29, p=0.040), patient education (F[1.210]=6.96, p=0.009), and relaxation techniques (F[1.194]=23.68, p<0.001) significantly more important than male AYAs. The study highlighted several areas of dissatisfaction with the current outpatient care services for AYAs. The results demonstrate the need to incorporate cross-sex and gender-specific care preferences of AYAs to improve outpatient psychosocial care. A specific set of AYA-care services should be designed and implemented to address the aforementioned psychosocial topics, which include sexuality and the desire for children/fertility. It is also crucial for outpatient practice to raise awareness among the involved professional groups. Further research is required to gain a deeper understanding of sex differences.